Browsing Doctoral Dissertations by Issue Date
Now showing items 1-20 of 102
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Modifikasi Aspal dengan Karet Alam Reaktif: Fungsionalisasi Karet Alam dengan Maleat Anhidrat (MA), Glisidil Metakrilat (GMA) untuk Meningkatkan Kinerja Aspal
(Universitas Sumatera Utara, 2024)Natural rubber biopolymer has the potential to be used as an additive in the manufacture of polymer modified asphalt or rubber asphalt. This study aims to synthesize a reactive polymer based on natural rubber (SIR-20) ... -
Penyediaan Pati Kationik dari Ubi Kayu (Manihot utilissima) dalam Pembuatan Kertas Berkualitas Berbasis Selulosa Bakteri
(Universitas Sumatera Utara, 2024)Cationic starch (CS) is one of the most frequently used additives in the paper industry because it has a low substitution rate and is used as a dry reinforcing agent in paper surface coatings, and can improve the optical ... -
Sintesis Nanosilikon Menggunakan Metode Hidrotermal dari Sekam Padi sebagai Anoda Baterai Litium-Ion
(Universitas Sumatera Utara, 2024)The hydrothermal method is a simple synthesis method that utilizes chemical reactions in solution at a temperature of 180 0C Hydrothermal is known to be effective in producing synthesized materials with structures that ... -
Sintesis dan Karakterisasi Hidrogel Berbasis Selulosa dari Tandan Kosong Kelapa Sawit sebagai Media Tanam pada Sistem Hidroponik
(Universitas Sumatera Utara, 2023)Oil palm empty fruit bunches are a source of natural fiber from the abundant waste material found in the North Sumatra region. The fiber of empty palm fruit bunches has a high cellulose content and has the potential to be ... -
Preparasi dan Karakterisasi Polivinilklorida Termodifikasi Anhidrida Maleat dan Butil Akrilat dengan Pengisi Sepiolite dan Organo-Sepiolite sebagai Bahan Kabel Tahan Panas
(Universitas Sumatera Utara, 2023)This research investigates the influence of using magnesium oxide (MgO) and sepiolite fillers in PVC blends and modification with maleic anhydride and butyl acrylate comonomers (AM/BA) on the properties of PVC blends. The ... -
Pengolahan Sludge Primer dan Abu Boiler dari Pabrik Pulp Sebagai Mikrofiller Panel Busa Komposit Penyerap Suara Berbasis Polistirena
(Universitas Sumatera Utara, 2022)Effort to utilize and improve the value of pulp waste was done by using boiler ash and primary sludge (still containing cellulose) being a filler to produce composite foam polystyrene (PS)-based as sound absorbent. In this ... -
Ekstraksi dan Imobilisasi Senyawa Aktif Berkhasiat Antibakteri dari Ekstrak Metanol Daun Pirdot (Saurauia vulcani, Korth) dalam Hidrogel Semi Interpretating Polimer Network
(Universitas Sumatera Utara, 2022)Research on the extraction and immobilization of antibacterial active compounds in methanol extract of pirdot leaves in semi IPN hydrogel has been carried out. This study aimed to analyze the antibacterial active compounds ... -
Uji Sitotoksik Senyawa Aktif Kalkon Tersubstitusi Halogen terhadap Sel Kanker Payudara MCF-7
(Universitas Sumatera Utara, 2022)The synthesis of halogen-substituted chalcone compounds was carried out using the Clasien-Schmidt condensation type aldol condensation method, using microwave radiation or ecofriendly. The number of substituted chalcone ... -
Sintesis Silikon Nanopartikel dengan Penambahan Garam Kalium Bromida Menggunakan Metode Magnesiotermik dari Sekam Padi dan Aplikasinya sebagai Anoda Baterai Litium-Ion
(Universitas Sumatera Utara, 2022)Preparation of silica from rice husks with variations calcination of 600oC, 700oC, 800oC, and 900oC and added NaOH then added HCl until pH 7. It was filtered and dried to obtain silica. FTIR characterization showed OH ... -
Hidrogel Karboksimetil Selulosa-Asam Sitrat-Polivinil Alkohol yang Diimobilisasi Zat Ekstraktif Daun Gaharu sebagai Material Sediaan Obat Luka
(Universitas Sumatera Utara, 2022)Agarwood twig and leaves are a by-product of agarwood plantations can be developed into medicinal raw materials. The purpose of this study was to determine the Carboximetyl Cellulose (CMC) potential of the agarwood twig ... -
Kinerja Paduan Grafitik Karbon (Grafena dan N-Grafena) dengan Logam Besi, Litium dan Mangan sebagai Anoda Baterai Sekunder
(Universitas Sumatera Utara, 2022)Research performance of Fe/Graphitic carbon (Graphene and N-Graphene), Li/Graphene Carbon (Graphene and N-Graphene) and Mn/Graphytic Carbon (Graphene and N-Graphene) as secondary battery anodes has been carried out. The ... -
Sintesis Nanopartikel Perak dengan Pereduksi Minyak Atsiri dan Ekstrak Air Bunga Lawang (Illicium Verum Hook.F) sebagai Pengisi Film Biomaterial PVA/GELATIN/AgNPs
(Universitas Sumatera Utara, 2021)A study on the synthesis of silver nanoparticles (AgNPs) formulated with essential oil and aqueous extract of bunga lawang (Illicium verum Hook. F.) has been conducted. The aim of this study were to yield the desired AgNPs ... -
Pembuatan Nanoserat Selulosa dari Serat Batang Pisang Abaka (Musa Textilis) sebagai Pengisi Hidrogel Biomedis
(Universitas Sumatera Utara, 2021)Serat pisang abaka merupakan sumber serat alami dengan sifat kimia dan sifat mekanik baik karena kandungan selulosa yang tinggi yang dapat memberikan kekuatan dan stabilitas pada dinding sel tanaman dan serat. Tujuan ... -
Modifikasi Permukaan Selulosa Limbah Serat Kulit Durian (Durio zubintinus, Murr) Melalui Reaksi Kopolimerisasi Cangkok dengan Monomer Ammonium Quartener dan Kitosan Bahan Antimikroba dan Antifungal
(Universitas Sumatera Utara, 2021)Bahan antimikroba dan antifungal merupakan senyawa yang berfungsi untuk menginhibisi aktivitas bakteri dan jamur. Tujuan dari penelitian ini adalah untuk mensintesis bahan antimikroba dan antifungal melalui modifikasi ... -
Karakterisasi Komposit Penyembuh Luka dari Kitosan-Pektin-Ekstrak Batang Pisang Kepok (Musa Paradisiaca.Linn) Melalui Uji Invitro dan Invivo
(Universitas Sumatera Utara, 2021)Utilization of chitosan-based composites as wound dressings has been promoted to accelerate the healing of skin connective tissue. The present study designed a new wound healing composite formulated from pectin and loaded ... -
Hidrogel Interpenetrating Polimer Network dari Selulosa Bakteri Air Kelapa yang Disuplementasi Ekstrak Kunyit (Curcuma Longa Linn), Bidara (Ziziphus Mauritiana) dan Pegagan (Centella Asiatica L. Urban), dan Potensinya Sebagai Obat Luka
(Universitas Sumatera Utara, 2021)This research aims to form a natural polymer-based IPN hydrogel formula which has potential as a wound medicine. The natural polymer used is bacterial cellulose which has higher purity than plant cellulose, and to maximize ... -
Pengaruh Konsentrasi Zink Oksida (ZnO) dan Oksida Grafena Tereduksi (rGO) pada Sifat Film Kitosan-Zink Oksida/rGO dalam Pendeteksian Formaldehida
(Universitas Sumatera Utara, 2021)This study studies the process of making working electrodes (WE) on copper screenprinted electrode substrate (Cu-SPE) as thin-film sensor chitosan nanoparticles (CS NPs), CS-ZnO, and CS-ZnO/rGO which is tested in electrolyte ... -
Modifikasi dan Karakterisasi Nanokomposit Karet Alam Siklis- Poliamida/Bentonit dengan Asam Oleat dan Divinilbenzena Sebagai Kompatibiliser Untuk Bahan Pengikat Cat
(Universitas Sumatera Utara, 2021)Cyclic natural rubber (CNR) is widely used as a resin for paint binder, but still has a weakness in terms of compatibility with polar surfaces such as polyamide (PA). The cause of immiscible PA and CNR is due to the ... -
Penyediaan Pembalut Luka Bakar Berbasis Selulosa Bakteri dengan Variasi Impregnasi Andaliman (Zanthoxylum Acanthopodium), Kitosan dan Kolagen
(Universitas Sumatera Utara, 2021)Bacterial cellulose (BC) is a biopolymer commonly used for wound dressing due to its high biocompatible properties either in-vitro or in-vivo. The three-dimensional fiber structure of BC becomes an advantage because it ... -
Karakteristik Arang dan Asap Cair dari Tempurung Kelapa menggunakan Reaktor Pirolisis Termodifikasi Tar Scrubber
(Universitas Sumatera Utara, 2021)The two main problems faced by the conventional coconut shell charcoal industry are low charcoal yield and smoke pollution. In addition, bio-oil products produced using traditional techniques are still of poor quality. ...